20550104330251 has 2 divisors, whose sum is σ = 20550104330252. Its totient is φ = 20550104330250.

The previous prime is 20550104330201. The next prime is 20550104330257. The reversal of 20550104330251 is 15203340105502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20550104330251 - 2¹⁹ = 20550103805963 is a prime.

It is not a weakly prime, because it can be changed into another prime (20550104330257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275052165125 + 10275052165126.

It is an arithmetic number, because the mean of its divisors is an integer number (10275052165126).

Almost surely, 2^{20550104330251} is an apocalyptic number.

20550104330251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20550104330251 is an equidigital number, since it uses as much as digits as its factorization.

20550104330251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 20550104330251 its reverse (15203340105502), we get a palindrome (35753444435753).

The spelling of 20550104330251 in words is "twenty trillion, five hundred fifty billion, one hundred four million, three hundred thirty thousand, two hundred fifty-one".